Keeping my S2R 800 going and healthy. Winter small things, again ...

[Howie]

Just the positive electrode gone and the rest of the plug intact is new to me too.  Unbelievable that plug was able to fire.

[greenmonster]

Overheating?
Too lean mixture due to
1. squashed spacer
2. map too lean for that cyl, offset map mishap
?

[stopintime]

Vertical (where the heat was most evident)
It looks hot.
1,000-1,500 km






Horizontal
(also hot)

[diamonddog-2]

 

[stopintime]

Leak down test + sensors diagnostics coming up, but first suspension work and snow shoveling 

[koko64]

Looking forward to seeing the diagnostics results.

White plugs with tiny black spots or just white?

[stopintime]

The plug diagnostics might not be worth much after just 1,000 - 1,500 km.

TPS still ok. The only two/three other engine sensors (old tech) ambient temp, barometric pressure and engine temp were functioning well (BTW: for those who ever wondered... the dash temp from the sump reads equal to the engine temp from the head)

Leak down test done yesterday:
cold test good 15 - 20% vertical, but ~70%   on the horizontal. (Don't get so excited just yet)
Warm up to 120 degrees Celsius..... just over 100 degrees there's smoke gushing out of the air box    Ok, so it was actually steam. We got rid of most of it (and later drained the oil). The air box was full of water from the two wet autumn months (when I didn't ride at all) and water came into the horizontal intake - maybe causing rust here and there.
Warm test good on both cylinders.


I'm glad that no serious and expensive damages were found, but I expect the bike to still under-perform. I won't know until spring. The only thing I have 'fixed' is the squashed plug washer and it's hard to know if that was the only thing wrong. What I don't like is that I'm now without a clue about what's next...

Injectors? We have very clean fuel here, so ..... (230,000 km old)
False air tested with Kent One Shot made for that purpose (and cleaning intake parts/ports)
Fuel filter? (150,000 km old)
The ECU map is good (if it was good on the Dyno it can't change by itself)
Coils? (230,000 km old)

Thoughts, ideas, suggestions?

[greenmonster]

My manual for my MTS doesn't mention fuel filter change (!) but 150 000 it is overdue.
Despite clean fuel, 230 000 on injectors is. also overdue I guess.

So, filter (and eventually injectors) makes it a little lean when no throttle and causing
engine to take more time to get to idle. Just guessing here...

[Howie]

Change the filter first.

[stopintime]

Change the filter first.

thanks!

[stopintime]

I've been waiting for suspension parts about six months  One box without MY parts, one box with wrong parts, another box with wrong parts and finally correct parts a weel ago - nicely spread out over six months.

The fork is now smooth as silk - new oil and improved shim stack. Shock normal service plus seal head repair kit and a new rebound adjuster screw. Both items have performed well ~70-90,000 km.

The height adjuster rod was a bit sloppy, so I ordered the US made rod from MotoWheels. Available in red anodized only (horrible color on a red bike). Nice and tight.

Meaty new pads. My preferred hot sinter Brembo - poor performance when cold and/or wet, but fantastic when hot.

Finally replaced the H4 generic lousy bulb I had to install last summer in Italy. The upgrade bulb is really good.










Next is a new Grip Puppy, clean air filter, lube electrical contacts, polish exhaust, fine tune the suspension and two new injectors (in the other Tech thread, about my strange flucyuating idle speed and lack of engine braking).

It's a little too close to the Alps & Italy tour, but my (probably original) starter said good night on Friday. (The diagnosis is that the fuel pump works, the electronics work, the solenoid says click and the starter doesn't react with 12 directly on the lug.)(good diagnosis?) Ordered an aftermarket item which should be here on Wednesday. No available slots in the workshops this time of year, so I'm going to add another skill to my resume - replacing a starter on a Ducati. 

[stopintime]

This is strange....

The fluctuating idle speed is now stable at ~1,500 when cold and ~1,200 when warm. I didn't notice poor engine braking. Will double check it.

Maybe the water in the inlet ports did something to the injectors? To the filter? Not usual to fix a bike with water, but ....

I'll replace the injectors soon.

[ducpainter]

Back in the day we used to sprinkle a little water into the intake to remove carbon deposits from the combustion chamber.

[ducpainter]

You can paint over anodizing. That height adjuster would look great in black.!

I concur with your diagnosis.

[stopintime]

Back in the day we used to sprinkle a little water into the intake to remove carbon deposits from the combustion chamber.

I'm old enough to claim participation in such a method